@article{singlelayer,
    title={An Analysis of Single-Layer Networks in Unsupervised Feature Learning},
    author={Adam Coates, Honglak Lee, Andrew Y. Ng},
    year={2010},
    publisher={NIPS}
}

@article{rf,
    title={Selecting Receptive Fields in Deep Networks},
    author={Adam Coates, Andrew Y. Ng},
    year={2011},
    publisher={NIPS}
}